Quartiles split a set of data into four equal parts. 25.0% of the values are smaller than the first quartile, Q_{1}, and 75.0% are larger. The second quartile, Q_{2}, is the median. 50.0% of the values are smaller than the median and 50.0% are larger. 75.0% of the values are smaller than the third quartile, Q_{3}, and 25.0% are larger.
The quartiles are defined in Equations (4.3) and (4.4).
First Quartile Q_{1}The first quartile Q_{1}, is the value such that 25.0% of the values are smaller and 75.0% are larger. Equation 4.3
where n = sample size |
Third Quartile Q_{3}The third quartile Q_{3}, is the value such that 75.0% of the values are smaller and ... |
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